Faeries can also do a currency conversion from zenny to zenny dust. Using the copy shop, or using a merchant, you can sell a faerie the player's current zenny dust, and they will immediately exchange for zenny using the conversion rate the player enters when the faerie is assigned. The faerie can then exchange the dust to the cost desired. Note that the loss rate is going to be based on an average, and this conversion will be less effective at low values, and more effective at high values. If you have the highest zenny dust value (or whatever they call it in your game), then using it for the conversion is not a good idea.
Another very trustworthy and valuable resource is the fortune teller. As mentioned earlier, you must have an inn to use this. Since the fortune teller has no place to rest, you must press the M key when he is onscreen. If he can speak to you, he will give a monologue, but if he cannot speak, his needle will spin. Whenever the needle stops, it will tell you what is true or false (just like the fortune teller in Faerie Solitaire), with very little variation, and is a good way to find out the relative value of items you've already found. If the needle keeps spinning, the use must wait some amount of time before the fortune teller will give a result. While fortune tellers are worthy of their 0.9 I.Q., you should be able to afford a higher value faerie for knowing your fortune.
The fish are the second most valuable resource, after the faeries. The primary difference between fish and faeries is that you must use them to bait your hook. Each player has a total of 320 fish in their harem (which may become limited if several players keep faeries, due to an unstated time limit to fish draining), but because they are more perishable, they are often taunted away when the player enters a lake. Occasionally, a fish will be missing, but the player cannot retrieve them by speaking to the fish, only to leave the village and then return, and the events still occur, with a fish appearing, rather than a corresponding event when the player returns. d2c66b5586